I await eagerly for this book.
One thing about twenty five year predictions is that most people who make them want to predict huge changes in human nature and the conditions of the world. If you say "things will be pretty much the same as now with a few changes. It costs millions of dollars to put a person in orbit, so there won't be any offworld colonies. Wars will still be fought because people will be as greedy and petty as ever. Things are improving from Ehrlich's mad rantings in the 60s, so there won't be any great starvation." you won't be invited back to make more predictions next year.
You may be waiting a long time - he died in 1995.